The Gallbladder ofUranoscopus ScaberL. (Teleost Perciform Fish) is Lined by Specialized Cholecystocytes

Abstract

The gallbladder of Uranoscopus exhibits a mucosal surface layer of simple columnar epithelium composed of specialized cholecystocytes. The apices show storage and mucous secretions, typical microvilli, and very apical projections extending deep into the luminal contents. Many organelles and heterogeneous vesicles of diverse size fill the cytoplasm, including neutral mucins, mitochondria, peroxisomes, lysosomal bodies, and lipid-rich deposits with cholesterol inclusions. The fibromuscular layer shows little blood supply and contains scattered lymph-like walls with minute cholesterol inclusions. The remaining muscular, subserosal, and serosal or adventitial layers of this species do not show any histologic differences to those of other Vertebrates. It was unexpected to find cholesterol inclusions in the fatty deposits of the cholecystocytes, similar to those noted in human cholesterolosis and in some forms of hypercholesterolemia, in this teleostean. In addition, aggregations of mitochondria and anomalous mitochondrial morphologies were found that resemble oncocytoma-like changes. Anat Rec, 294:1890Rec, 294: -1903Rec, 294: , 2011. V V C 2011 WileyLiss, Inc.

A Histological and Histochemical Study on the Gallbladder of the Alburnus tarichi (Güldenstädt, 1814) (Cyprinidae)

“…The histological layers of the gallbladder wall were composed of mucosa including surface epithelium and lamina propria, circular smooth muscle, and serosa. Those layers are also present in other fish species (Western, 1969;Gupta, 1971;Gilloteaux et al, 2011Gilloteaux et al, , 2013Nazlic et al, 2014) and in agreement with other vertebrates and mammals Mobini & Poursafar, 2019). The surface epithelium lining the mucosal folds thrown into the lumen of the gallbladder is comprised of tall columnar cells.…”

Comparative Anatomical and Histological Study of Some Organs in Two Fish Species Cyprinus Carpio Linnaeus, 1758 and Mesopotamichthys Sharpeyi (Günther, 1874)(cypriniformes, Cyprinidae)

“…The epithelial cells posse deeply stained spherical nuclei, and a thin layer of lamina propria under epithelial cells, these results agree with Mohammed (2001) and Nazlić et al (2014). The muscular layer occupies more than half of the wall width and consists of longitudinal and oblique smooth muscle fibers (Pls.11,12), this results compatible with Gilloteaux et al (2011).…”

The Gallbladder of the Electric Ray Torpedo Marmorata Risso Displays Excrescent Cholecystocytes with Merocrine and Apocrine‐Like Secretions

“…Numerous exocytoses of mucus need recycling of membranes and probably those many lysosomes are related to these events. We also noted that peroxisomes were not present, as they are in the teleost gallbladder (Gilloteaux et al, 2011) and other organs (Moyes et al, 1991). This absence may well correlate with the poikilothermic metabolism (Pica et al, 2001) and poor cytochrome content in large nucleated erythrocytes, confirming the low respiratory activity of elasmobranches (Hughes and Johnston, 1978).…”

“…In Torpedo marmorata mucus is secreted in a merocrine and an apocrine mechanism. Torpedo gallbladder mucus secretion resembles that found in many other species of vertebrates, inclusive of teleosts (Viehberger, 1982, 1983; Gilloteaux et al, 1995; Oldham‐Ott and Gilloteaux, 1997; Gilloteaux et al, 2011). However, we observed a striking resemblance of the apical modifications and apical extrusion of mucus to those shown with SEM (Gilloteaux et al, 1993a, b) and TEM in cases of cholelithiasis induced in the Syrian hamsters (Gilloteaux et al, 1997a, b), as well as in human pathologies, such as in cholecystitis (Gilloteaux et al, 1997b, 2003, 2004).…”

“…During a comparative morphological study of the bile tract in several vertebrates, we observed the gallbladder morphology of various fish species (Gilloteaux et al, 1995; Oldham‐Ott and Gilloteaux, 1997). To date, the most complex gallbladder epithelial morphology was observed in the stargazer (Gilloteaux et al, 2011), probably adapted to an unusual ethologic and predatory diet niche. This study was undertaken to study the morphologic peculiarities of the Torpedo marmorata gallbladder, also a predator but an Elasmobranch.…”